Liquid pump



C. O. EUENGER LIQUID PUMP Filed Jan. 10, 1930 4 Sheets-Sheet l I 6/4216 6d$22 77 a" May 10, 1932.

C. O. BUENGER LIQUID PUMP Filed Jan. 10. 1950 4 Sheets-Sheet 2 Patented May 10, 1932 GLARENCEJO. BUENGER'r,- OE CHICAGG, ILLINOIS, ASSIGNOR TOj I-IILL-S-MCCANNA- COM.-

PANY, OF CHICAGO, ILLINOIS, Av CORPORATION- F ILLINOIS LIQUID BUMP Application filed January 10, 1930; Serial N'o; 419,768:

My=invention relatesto liquid "pumps, and i particularly to: variable capacity pumps.

One of the objects of my invention is to a provide a positive action-for supplying fluid under positivepressure.

Anotherobject of my invention isto provide a single means to drive a duplex pump.

Another object of m-y invention'isto provide a single-means to drive a quadruple; 0 pump;

Another object of=my invention is'to pro vide means for predetermining the volume of flow. through the pump F Anotlier-objectofthe invention is to prov-ide means for-predetermining the volume o-f flow' through the pumps independently of eachother;

Another object-oitm-y invention is to prov'ide means for setting the pump capacity with a high degree of precision.

Anothersobject of my, invention is to provide-means forpumping fluids at high pres-- sure from a comparatively small amount of power. 2 These and other objects will be attained and will be pointed out in the claims.

In the drawings Fig. 1 is a side elevation of the pumping V outfit; Fig. 2 is a plan thereof;

Fig. 3 is a detail view of the pumping element in part section to disclose certain details of construction;

Fig. at is a section at the line L l on 3;

Fig. 5 is a section at the line 55 on Fig. 1;

Fig. 6 is a section at the line 6-6 on Fig. 5;

F i 7 is a View similar to Fig. 3, showing anotlier arrangement of certain parts; and Fig. 8 is a partial plan view of the parts shown in Fig. 7.

The pumping outfit as shown in Figs. 1 and 2 consists of a base 1, the two pumps 2 and 3. the motor 4, and a speed-reducing drive 5 of common type which may be understood as consisting of the usual worm and gear drive, but the worm-wheel shaftfi extends beyond the case of the speed-reducer 5 and has the two crank arms 77 for driving the connecting rods 88, which operate the swinginglinks 2- and 3*"ofithe pumps Q-tandt 8; respectively.

The pumps 2 and 3 have the intake and em haust connections 2 2 an'd-3?-3.

Each crankv arm 7 is arrangediand 0011+ structed so as to vary the-effective throw oft the connecting; rod: 8 xwh ichzis pivoted at 7. This pivot, which actsas a; wristpin,-- is mou'ntedon or integraliwith a cross headi block 7* slidab'ly mounted in guideways G0 7 T of the cranlr'l. At eachendiof the" guideway are the bearing blocks 7 7 e which"; furnish journals for: an aoljirstingscrewthreaded rod 10; Aknurled thumb'nut 11 is securedasa pin-lZ-to: the end of the! IOClllO" 5 which protrudes through the journalbloclo:

The Wrist pin 7 so mounted,- provides means for operatingth'e pump so that. any;

quantity desired to be delivered within its 1 capacity will be very accurately measured;

Eachpuinp 2 and S has its 0peratings.wing-= inglinlcadjust'ably connected to. a ash'aft 9:;

In Figs. 3 and 4: is shown the means-- of? adj ustabl-y mounting a the swinging arm'ito. a splined shaft 9, the splines 9*beingtprovideda for the arm and siinilarvsplines 2. at 9 pro: vided 1 for a pinion 16,1 which transmits ;its motion (derived ithroughthe swinging-armi and th e shaft 9 upon which it is mounted)* so. to the toothed rack 17, whichissecurely attach'ed -to theupper end of the plunger 15.

It will thus be seen th'atlthe rotation of the: shaft 6 of the speed-reducer causes-ireciproca.-, tion ofth'e plunger 15: andthat any-.degreeioft the possible travel of the plungerma-yi'bee accurately controlledbyimeansofthe adjustable-wrist pin 'F'whichf is carried"by the-crosss' head 7 To add durability and long litev to: the pump, the; pinion :16," whichis spl-ined :to the shaft 9, has teeth cut'completely aroundtsoc that as those in mesh with-the rack: become; Worn, .a' new set may% be providedvby simply" withdrawing; the shaft and rotating; thez pinion-.- The rack17 is. alsoemounted-onthe' plungerql5 'with'a- View of easily replacing itby removing 1 aupin .15 which 'loeks-a-screw-. threaded connection 2.1317.

Journals for the shaft 9 are provided at-l8e 10 and 19, which may be made of special bearing-metal and attached by the screws 18 and 19 so as to be easily replaceable.

The pinion 16 shown in Fig. 3 may be utilized for a further use beyond that shown in this figure; in Fig. 7 is shown an arrangement whereby two pumps may be driven by arranging their plunger racks 3031 at opposite sides of the pinion 16*. The pump cylinders 32 and 33 may be arranged at each side of a frame 36 which supports the cylinders as well as the pinion 16*, which is mounted on the shaft 9 in the housing 36. It is to be understood that the housing 36 contains a pinion similar to 16 for operating the pumps 34 and .35 and that the swinging arm 37 is duplicated and arranged in all respects beyond that, to operate from opposite ends of a speed-reducing element such as is shown in Fig. 2. Thus, four pumps may be driven from the same motor.

For the purpose of obtaining a continuous flow or approximately so, it is only necessary to join two of the exhaust pipes, as indicated in Fig. 8, the pipe 32 joining the pipe 33 at a T fitting 40 and discharging both into a pipe 41.

It is obvious that to produce the same result in an arrangement as indicated in Fig. 3 the crank arms on the speed-reducer may be set at 180 from each other, so that when one pump is exhausting the other is taking in a charge preparatory to discharging it when the first is on its intake stroke.

Since extremely high pressures are expected to be encountered in the cylinder, a very generous stufling-box is provided at 20, with a gland 21 forced down by the stud-bolts 22-22.

Any one of these pumps may be put out of use by adjusting the cross'head 7 at the position indicated by dotted lines in Fig. 1, that is, the center of the wrist pin '2' coincident with the center of the shaft 6, or removing the connecting rod 8 which is held in place by the bolts at both ends thereof.

It will be noted that such moving parts as are subject to greatest wear are made replaceable and apart from the main pump frame 23, so that maintenance is reduced to a minimum.

Many changes and modifications may be made without departing from the spirit of my invention.

I claim 1. In a pump mechanism the combination of a'motor, a speed reducing unit operatively connected to the motor, said unit having an operating shaft provided with a crank arm, a link connected with said crank arm, a pump plunger and a rack and pinion connection between the plunger and said link whereby the plunger is automatically reciprocated by r the reciprocation of said link by said crank arm.

2. In a pump mechanism the combination of a motor, a speed reducing unit operatively connected to the motor, said unit having an operating shaft provided with a crank arm, a link connected with said crank arm, a pump plunger and a rack and pinion connection between the plunger and said link whereby the plunger is automatically reciprocated by the reciprocation of said link by said crank arm, said connection comprising a pinion meshing With a rack on the pump plunger, and a swinging arm on the pinion shaft pivotally connected with said link.

3. The combination with a motor of a speed reducing unit connected with the motor and having a driving shaft provided with a rotating arm, a driving link having a sliding connection with said arm, a swinging arm piv-- otally connected with the other end of said driving link, a pinion carried by the shaft of said swinging arm, and a pump plunger having a rack meshing with said pinion.

4. The combination with a motor of a speed reducing unit connected with the motor and having a driving shaft provided with a rotating arm, a driving link having a sliding connection with said arm, means for adjusting said sliding connection and maintaining same in adjustment, a swinging arm pivotally connected with the other end of said driving link, a pinion carried by the shaft of said swinging arm, and a pump plunger having a rack meshing with said pinion.

It witness whereof, I hereunto subscribe my name this 27th day of December, A. D.

CLARENCE O. BUENGER. 

